Title :
A Dual-Band Circularly Polarized Complementary Antenna
Author :
Weilong Liang ; Yong-Chang Jiao ; Yuchen Luan ; Chao Tian
Author_Institution :
Nat. Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China
Abstract :
A dual-band circularly polarized complementary antenna loaded with adjusting stubs is presented. The antenna consists of a semi-circle shaped printed monopole fed by a 50- Ω microstrip and the complementary metal structure part connected to the ground plane. Due to the complement structure, this antenna can work in dual-band linearly. To achieve dual-band circular polarization, rectangular and L-shaped adjusting stubs are added. By adjusting the parasitic elements appropriately, the conventional complementary antenna can be converted into a dual band circularly polarized antenna. The antenna impedance bandwidths are 400 MHz centered at 2.5 GHz and 2000 MHz centered at 5.8 GHz. The 3-dB axial ratio (AR) bandwidths are 40 MHz centered at 2.41 GHz and 640 MHz centered at 5.38 GHz. The measured results agree well with the simulated results.
Keywords :
antenna feeds; electromagnetic wave polarisation; microstrip antennas; monopole antennas; multifrequency antennas; L-shaped-adjusting stubs; antenna feed; antenna impedance bandwidth; axial ratio bandwidth; bandwidth 2000 MHz; bandwidth 40 MHz; bandwidth 400 MHz; bandwidth 640 MHz; complementary metal structure part; conventional complementary antenna; dual-band circularly-polarized complementary antenna; frequency 2.41 GHz; frequency 2.5 GHz; frequency 5.38 GHz; frequency 5.8 GHz; ground plane; microstrip part; parasitic elements; rectangular stub; resistance 50 ohm; semicircle-shaped printed monopole; Antenna measurements; Bandwidth; Dual band; Polarization; Slot antennas; Surface impedance; Circularly polarized; complementary antenna; dual-band;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2015.2392787
